A hotter, more toxic atmosphere isn't the only negative consequence of melting Arctic ice.
As the glaciers and ice sheets turn from solid to liquid, sea levels are rising. This means things that didn't used to be underwater--like island nations and beachfront properties--are getting wet.
Recently, every rainy season in the San Blas Islands brings massive flooding as a result of rising ocean levels caused by global warming. In the foreground, a traffic sign reading "Slow Down" is partially submerged.
Humans didn't cause any of this, and we can't stop it either. We may be using too much water, but we aren't affecting the overall climate. The surface of Mars is getting hotter - who's causing that?
the only thing i feel sorry about at this point is that we're currently taking a lot of other species and habitat down with us (the holocene extinction) and it's only going to get worse. OTOH there's still about 500m years left for the earth's atmosphere to support complex life. so i hope it comes back strong one day... minus us clever dumbasses.
good luck with that, kiddos. :)
Basically man-made climate change is a load of horsebollocks.